A Highborn/Noble can fill many roles on the battlefield since he has a fantastic statline, some great wargear and a rock solid leadership. Whether you want a 1 hit pony Assassin, Unit Support, High Damage Dealer or Tank the Highborn/Noble will be able to fill these roles pretty well.
Wood Elves can suffer greatly if exposed to Monsters, Wizards and Warmachines luckily for us we have some really powerful character builds that help tip the balance in our favor and put us down the road to victory. The idea behind an Assassin is to hit a key target and kill it in the first round of combat because chances are you will only get one shot and if you mess up your dead. Due to the risk involved in running such characters Highborns are rarely used, and the cheaper Nobles tend to make up the Assassin builds ranks. To succeed as an Assassin you need both hitting power and mobility. The key to mobility is to either be Altered or ride a Great Eagle, here are some ideas:
*Remember Alter Kindred gives you +1 attack, M9 and I9
Helm of the Hunt
Rageths Wildfire Blades
Potion of Strength/Potion of Foolhardiness
This guy packs a mighty punch and is one hell of a monster slayer. If you take the Potion of Strength (slightly more expensive) you are coming in with 6 S7 Flaming Attacks. This is brutal against just about anything but especially against Wizards and Monsters. Since you are negating regeneration you will really pile on the hurt when fighting things like Trolls, Hell Pits, Hydras or regenerating characters, you are also very effective at taking out Flammable units such as Tomb Kings/Princes and Treemen. If you take the Potion of Foolhardiness you get 7 S4 Flaming Attacks however you are also immune to psychology when you charge which means the bigger monsters which would cause terror wont effect you so whilst you sacrifice raw hitting power you gain extra attacks and don't run the risk of crapping your pants when you come to charge!